Catch Test Calculation - Raven SCS660M Installation & Service Manual

D x GH x GW
1728
13 x 7 x 15
1728
[33] x [7] x [15]
Note:
When cubic inches are being converted to cubic feet, it is necessary to divide the product by 1728.
Because cubic cm are not being converted to another unit of measure, it is not necessary to divide
the product for the calculation.
Finally, calculate the Spreader Constant value using one of the following formulas, using the example of a 180
CPR granular encoder. Write down this number for future reference when programming the console.
Rate in Pounds:
Cubic Feet of Discharge per 1 Sensor Revolution
Rate in Kilograms:
Cubic Feet of Discharge per 1 Sensor Revolution

Catch Test Calculation

Verify that the Spreader Constant value os 0, with no decimal in METER CAL.
1.
Enter a value of 200 in METER CAL.
2.
Enter 0 in TOTAL VOLUME.
3.
Run the machine under normal operating conditions, collecting a sample large enough to weigh accurately.
4.
Weigh the sample that was collected.
5.
Use the following formula to calculate the Spreader Constant value:
6.
METER CAL x TOTAL VOLUME
Actual Volume
Manual No. 016-0159-845
= Cubic Feet of Discharge per 1 Sensor Revolution
= .790 cubic feet of discharge per 1 sensor revolution
= 22,572 cubic cm of discharge per 1 sensor revolution
P
180 =
.790
P x 100,000
180 x 100,000 =
22,572
x Product Density
10
= Spreader Constant Value
228 Pounds
= Spreader Constant Value
797 Kilograms
= Spreader Constant Value
Introduction
7